Combined muffler and cut-out



2 R. M. TAYLOR COMBINED MUFFLER AND CUT-OUT Original Filed August 29. 1924 Patented Jan. 18; 1927.

' UNITED STATES PATENT OFFICE.

RAYMOND M. TAYLOR, OF INDIANAPOLIS, INDIANA.

COMBINED MUFFLER AND CUT-OUT.

Application filed August 29, 1924, Serial No. 734,993. Renewed November 26, 1926.

My said invention relates to a combined.

i ure 1.

In the drawings reference character 10 indicates the body of the device which is a.

hollow tube reduced at one end as indicated at .11 for connection to the exhaust manifold. At the other end it is bent downward at an angle of about 45, as shown at 12, this be ing to directthe hot gases away from the spare tire or whatever accessories or impedimenta may be attached to the rear of the car.

Normally the tube is closed by a butterfly valve 13 which is operated by a bent lever 14 having one arm connected by a rod or wire 15 to a pedal or manually operated device 0 according to the custom of the trade.

I A spring 16 is connected at one end to the other end of the lever 14 (preferably the shorter end) which spring is-connected at its other end to another arm 17 on the shaft 18 of the valve 13, the length of this spring being so regulated that it tends to close the butterfly valve by pulling it against a stop indicated at 19.

The spring 16 passes underneath a branch pipe 20 leadingout of the pipe 10 and havlng an open end beneath the downwardly inclined portion 12. Normally the valve 13 is closed and the exhaust gases after expanding in themufiler body 10 pass outwith a uniform flow quietly through the pipe 20.

It is well known to those skilled in the art that mufllers of ordinary type have a serious drawback in that they causaback pressure on the engine whereby the engine loses power. For this reason automobile engines and the like are often provided with cut-outs which'can he used on hills or elsewhere when extra power is desired. Internal combustion engines employed by. agencies of the Government are ordinarily not supplied with mufilers because of the loss of'power due to back pressure. In the mufiier of my invention the part 11 of the large pipe expands gradually to the larger diameter of the part 10 and this form has been adopted because of the fact that it permits the gas to expand graduallyand quietly and after it has reached the largest expansion permitted by the dimensions of the mufller it can ex haust quietly through the small pipe 20 without causing any appreciable back pressure on the engine. The use of a mufller oi" the type illustrated with the butterfly valve closed substantially obviates back pressure and when the butterfly valve isv opened back pressure is completely obviated.

It will be obvious to those skilled in the art that my device may be changed in numerous articulars without departing from the spirit of the invention and therefore I do not limitmyself to what is shown in the drawings and described in the specification but only as indicated in the appended claim. For example, the spring 16 may have one end connected to a fixed part of the machine.

Having thus fully described my said in-- vention what I claim as new and desire to secure by Letters Patent is:

A combined muffler and cut-out for inter-- nal combustion engines comprising a relatively large pipe for connection to the exhaust manifold, a portion of said pipe gradually increasing in diameter rearwardly from the exhaust'manifold, a valve for normally closing said pipe, and a relatively small pipe with a normally open outlet and connected directly with said large pipe, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 27th day of August, A. D; nineteen hun' dred and twenty-four.

RAYMOND M. TAYLOR. [as] 

